Cal. Pub. Res. Code § 5561.5

The board may provide by resolution or regulation for the care, restitution, sale, or destruction of unclaimed property in the possession of the district. Any resolution or regulation adopted pursuant to this section shall provide therein (1) that such unclaimed property shall be held by the district for a period of at least six months, (2) that thereafter such property will be sold at public auction to the highest bidder, and (3) that notice of such sale shall be given by the board at least five days before the time therefor by publication once in a newspaper of general circulation published in the district. The board may dispose of any such property upon which no bid is made at any such sale.